Alarm-gong



0 F. WEST. Alarm-Gong.

No. 225,447. Patented Mar. 9, I880.

mvnmom WITNESSES ATTORNEYS.

man-Ens. hibmmnomwnsn, wmimmon. o, c.

UNITED STATES PATENT OFFICE.

CHARLES F. WEST, OF PHILADELPHIA, PENNSYLVANIA.

ALARM-GONG.

SPECIFICATION forming. part of Letters Patent No. 225,447, dated March 9, 1880,

V Application filed August 1, 1879.

To all whom it may concern Be it known that I, CHARLES F. WEsT, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and Improved AlarmGong, of which the following is a specification.

Figure l is a front elevation, in perspective, of the device with the gong itself simply outlined. Fig. 2 is a side elevation of the same on line a: :20, Fig. 1.

Similar letters of reference indicate corresponding parts.

The object of this invention is to provide a simple, durable, and easily-actuated alarm attachment for doors.

The invention consists of a peculiar arrangement of lever, striker, and trigger, hereinafter described, that render the alarm especial] y durable and of easy operation.

In the drawings, A represents the door, and B the doorframe. O is a plate screwed or otherwise fastened upon the door-frame and supporting the standard D, on the end of which is fixed the gong E, that is provided with an aperture, a, through which passes the lever F, carrying the striker or hammer G on one end and having the trigger H pivoted to the other end, the lever itself being pivoted to the end of the standard.

I is a post fixed on the plate 0, having coiled around it the wire spring K, one end of which presses against the standard D, While the other is engaged by the rod L, that extends horizontally from the lever F. M is a bent finger fastened on the door.

The trigger is T-shaped and secured to the lever so as to project slightly beyond and beneath its lower end, so that on the opening of the door the finger M will engage with the said trigger and lift it, together with the lower end of the lever, thereby elevating the striker or hammer. As the door is opened wider the trigger slips off the finger, being actuated thereto by the spring K, and the hammer at once strikes the gong. As the door closes the finger comes in contact with the T-head of the trigger, which at once yields to permit it to pass, and then resumes its original position. The lever is so long and so shaped that but a slight movement of its lower end will cause it to operate the hammer readily The simplicity and effectiveness of this device cannot fail to recommend it.

Having thus described my invention, what I claim as new, and desire to secure by Let ters Patent, is-

1. The withindescribed alarmgon g, consisting of plate 0, standard D, gong E, provided with aperture a, lever F, provided with striker G and trigger H, post I, spring K, and rod L, construct-ed and arranged substantially as and for the purpose designed.

2. The combination, with gong E, of the hammer-lever F, passing through gong E, pivoted to extension end of standard D, and provided with the hammer G and trigger H at opposite ends, as set forth.

CHARLES FREDERICK WEST.

Witnesses:

O. H. SHOEMAKER, CHAS. T. HARNED. 

